19:1 Metal Gearmotor 37Dx68L mm 12V with 64 CPR Encoder (Spur Pinion)

Pololu item #: 2822
Brand: Pololu
Status: Obsolete 
RoHS 3 compliant

This product has been discontinued.

This gearmotor has been replaced by a functionally identical version that uses helical pinion gears for the first stage of the gearbox to reduce noise and improve efficiency.

This gearmotor is a powerful 12V brushed DC motor with a 18.75:1 metal gearbox and an integrated quadrature encoder that provides a resolution of 64 counts per revolution of the motor shaft, which corresponds to 1200 counts per revolution of the gearbox’s output shaft. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.

Key specifications:

voltage no-load performance stall extrapolation
12 V 530 RPM, 200 mA 8.5 kg⋅cm (120 oz⋅in), 5.5 A

Alternatives available with variations in these parameter(s): gear ratio encoders? Select variant…

 Description Specs (21) Pictures (14) Resources (4) FAQs (1) On the blog (2) 

Dimensions

Size: 37D × 68L mm1
Weight: 200 g
Shaft diameter: 6 mm2

General specifications

Gear ratio: 18.75:1
No-load speed @ 12V: 530 rpm
No-load current @ 12V: 0.2 A
Stall current @ 12V: 5.5 A3
Stall torque @ 12V: 8.5 kg·cm3
Max output power @ 12V: 12 W
No-load speed @ 6V: 270 rpm4
No-load current @ 6V: 0.15 A4
Stall current @ 6V: 3.0 A5
Stall torque @ 6V: 5.0 kg·cm5

Performance at maximum efficiency

Max efficiency @ 12V: 55 %
Speed at max efficiency: 470 rpm
Torque at max efficiency: 1.0 kg·cm
Current at max efficiency: 0.76 A
Output power at max efficiency: 5.0 W

General specifications

Lead length: 20 cm6
Encoders?: Y
Encoder resolution: 64 CPR

Notes:

1
Length measurement is from gearbox face plate to back of encoder cap (it does not include the output shaft). See dimension diagram for details.
2
D shaft.
3
Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. As the motor heats up, as happens as it approaches an actual stall, the stall torque and current decrease.
4
This motor will run at 6 V but is intended for operation at 12 V.
5
Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. This motor will run at 6 V but is intended for operation at 12 V.
6
May vary by a few centimeters.

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